Chinese Journal of Quantum Electronics, Volume. 27, Issue 1, 57(2010)

Quantum entanglement in a system of squeezed coherent state light field interacting with two entangled atoms

Cai-hua ZHANG1、*, Sachuerfu 1,2, and Gerile 1
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  • 1[in Chinese]
  • 2[in Chinese]
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    The quantum entanglement of two entangled atoms interacting with the squeezed coherent state is studied by means of full quantum theory. The influences of coherent amplitude factor, squeezing factor, ratio of two coupling coefficients on the entanglement property are discussed. The results show that two atoms entanglement evolution property is opposed to atom-field entanglement evolution property when the coherent amplitude factor was zero or small. The interaction of the atoms and field weakens the entanglement degree of atom-atom. With increasing coherent amplitude factor or decreasing squeezing factor of light, the time of two atoms staying in the steady entangled state becomes longer. The increase of the coherent amplitude factor or the decrease of squeezing factor of light lead to the increase of atom-atom entanglement degree while the decrease of atoms-field entanglement degree. Moreover, the two-atom quantum state stays in the maximum entangled state when the atomic dipole-dipole coupling coefficient is large enough.

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    ZHANG Cai-hua, Sachuerfu, Gerile. Quantum entanglement in a system of squeezed coherent state light field interacting with two entangled atoms[J]. Chinese Journal of Quantum Electronics, 2010, 27(1): 57

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    Paper Information

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    Received: Mar. 9, 2009

    Accepted: --

    Published Online: May. 31, 2010

    The Author Email: Cai-hua ZHANG (zhang828920@yahoo.com.cn)

    DOI:

    CSTR:32186.14.

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